CN110918844B - Thin-wall multi-ring high-rib component space envelope forming method - Google Patents
Thin-wall multi-ring high-rib component space envelope forming method Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/022—Open die forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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Abstract
The invention relates to a space enveloping forming method for constructing a thin-wall multi-ring high-rib component, which comprises the following steps of: s1, blank design: the blank is a disc material; s2, hot forging and forming the prefabricated blank; s3, softening and lubricating the preform: carrying out annealing treatment, shot blasting descaling treatment and phosphorization saponification treatment on the prefabricated blank obtained in the step S2; s4, space envelope shaping: placing a prefabricated blank into a finish forging female die cavity formed by space envelope, wherein the bottom surface of the prefabricated blank is contacted with the bottom surface of the finish forging female die cavity, the outer side surface of a high rib of the outer ring of the prefabricated blank is contacted with the inner wall of the finish forging female die, and the molded surface of a positioning boss is contacted with the molded surface of a positioning groove at the bottom of the finish forging female die; s5, opening the die and demoulding; and S6, machining the high-rib end face. The invention can obviously reduce the deformation dead zone which is easy to appear in the common die forging, obviously improve the flow property of metal, and the process can obviously refine the grain size, improve the carbide form and form the texture structure which is beneficial to improving the component property by repeatedly rolling the blank.
Description
Technical Field
The invention relates to the technical field of thin-wall multi-ring high-rib components, in particular to a space envelope forming method of a thin-wall multi-ring high-rib component.
Background
With the increasing progress of integration, precision and light weight of high-end equipment in China, equipment designers carry out deeper structural optimization on the high-end equipment parts, so that the geometrical configurations of the parts are more complicated. Thin-wall multi-ring high-rib members with structural characteristics of thin walls, high ribs and the like are widely applied in the field of equipment. However, the web of the part is thin, and the ribs are high and narrow, so that the part is extremely difficult to process. At present, the thin-wall multi-ring high-rib component is mainly manufactured by adopting a cutting processing technology.
However, the manufacture of such components by machining processes has numerous disadvantages: (1) a cutting process is adopted to cut off a large amount of metal between every two high ribs, and the material utilization rate is extremely low and is only 30-50%; (2) due to the limitation of the size of the cutter, the cutter cannot be fed to the bottom of a deep and narrow deep groove formed between high ribs, so that the profile of the high ribs cannot be machined; (3) the metal streamline is cut off by the cutting process, so that the mechanical property of the member is poor; (4) the efficiency of the machining process is low. In recent years, the related art has proposed to form a thin-walled multi-ring high-rib member by a one-piece die forging process, but due to a large amount of plastic deformation, a multi-step one-piece die forging process is generally required. The multi-step integral die forging forming process has the advantages of long production period and high equipment occupancy rate, and in the later stage of die forging forming, because metal flows are very difficult, deformation dead zones are very easy to occur, and high ribs are very difficult to fill. In addition, because the metal flow at the later stage of die forging is difficult, the forming load is increased rapidly, and the service life of the die is seriously reduced, the scheme of producing the thin-wall multi-ring high-rib component by adopting a multi-step integral die forging forming process at present is not widely applied. In conclusion, efficient and high-quality manufacturing of the thin-wall multi-ring high-rib component is difficult to realize by adopting a cutting machining process and a multi-step integral die forging forming process.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a space enveloping forming method of a thin-wall multi-ring high-rib component, which can obviously reduce deformation dead zones which are easy to appear in common die forging, obviously improve the flowing property of metal and is very beneficial to forming the component with thin walls and high ribs; in addition, the process can obviously refine the grain size, improve the carbide form and form a texture structure which is beneficial to improving the component performance by repeatedly rolling the blank.
The technical scheme adopted by the invention for solving the technical problems is as follows: a space enveloping forming method for a thin-wall multi-ring high-rib component is constructed, the thin-wall multi-ring high-rib component comprises a web plate, inner ring high ribs and outer ring high ribs, and the method comprises the following steps:
s1, blank design: the blank is a disc material, and the diameter of the bottom surface of the disc material is the maximum excircle diameter of the thin-wall multi-ring high-rib component;
s2, performing hot forging forming on the preform: heating the disc material in S1 to 950-1150 ℃, putting the disc material into a preform female die, and forging the disc material into a preform shape under the loading of a press machine; the outer ring high rib of the prefabricated blank is higher than the inner ring high rib, and the middle part of the bottom surface of the prefabricated blank is provided with a boss for accurately positioning and containing redundant metal in a finish forging female die for space envelope forming of the prefabricated blank; after the hot forging forming of the prefabricated blank is finished, first ejection rods uniformly distributed in the prefabricated blank female die move upwards to eject the prefabricated blank out of a prefabricated blank female die cavity;
s3, softening and lubricating the preform: carrying out annealing treatment, shot blasting descaling treatment and phosphorization saponification treatment on the prefabricated blank obtained in the step S2;
s4, space envelope shaping: placing a prefabricated blank into a finish forging female die cavity formed by space envelope, wherein the bottom surface of the prefabricated blank is contacted with the bottom surface of the finish forging female die cavity, the outer side surface of a high rib of the outer ring of the prefabricated blank is contacted with the inner wall of the finish forging female die, and the molded surface of a positioning boss is contacted with the molded surface of a positioning groove at the bottom of the finish forging female die; the envelope die is a cone with an inner boss and an outer boss, and the preformed blank is pushed by the finish forging female die to approach the envelope die, so that the high-rib molded surface of the preformed blank is contacted with the envelope die which does rotary envelope motion; under the spatial enveloping motion of an enveloping die, the preformed blank generates continuous local plastic deformation to force metal to flow into inner ring high-rib and outer ring high-rib cavities of the enveloping die, a gap between a boss and an outer boss in the enveloping die is used for forming member inner ring high-rib, and a gap between an outer boss and a female die of the enveloping die is used for forming member outer ring high-rib, so that a high-rib molded surface of a final forging piece is formed; the top of the boss inside and outside the enveloping die and the bottom of the female die are used for forming a component web plate; after the high-rib profile and the web plate of the final forging piece are completely formed, redundant metal flows out of the final forging female die from the outer ring high rib to form flash;
s5, opening the die and demoulding: after S4, the enveloping die continues to keep rotating enveloping motion, the finish forging female die starts to move reversely, and the finish forging piece descends to the initial position along with the finish forging female die; then second ejection rods which are uniformly distributed and arranged in the finish forging die eject the finish forging upwards to complete the demoulding of the finish forging;
s6, machining a high-rib end face: taking the bottom surface of the final forging obtained in the step S5 and the outer side surface of the outer ring high rib as positioning references, placing the final forging into the positioning seat, pressing the final forging in the middle area of the bottom surface of the high rib profile along the axial direction by the push rod, and fixing the final forging on a lathe under the action of the positioning seat and the push rod; and (3) driving the finish forging to rotate by the lathe, feeding the lathe tool along the radial direction of the finish forging, and cutting off the inclined flash and the preset machining allowance of the high-rib end face to obtain the thin-wall multi-ring high-rib component.
In the scheme, the design method of the finish forging of the thin-wall multi-ring high-rib member comprises the following steps: the top parts of the inner ring high rib and the outer ring high rib of the thin-wall multi-ring high rib component are increased by 3 mm-5 mm; the die parting surface of the final forging piece is a plane where the heightened outer ring high rib top is located; the top of the outer side surface of the high rib of the outer ring of the finish forging is provided with an inclined flash, and the inclination of the flash is 45-60 degrees.
In the scheme, the method for designing the prefabricated blank of the thin-wall multi-ring high-rib component comprises the following steps: the height of the outer ring high rib of the prefabricated blank is 60-70% of that of the outer ring of the final forging piece, and the height of the inner ring high rib of the prefabricated blank is 20-30% of that of the inner ring of the final forging piece; the thickness of the inner ring high rib and the outer ring high rib of the prefabricated blank is 0.5mm less than that of the inner ring high rib and the outer ring high rib of the final forging piece on one side; no flash is designed on the prefabricated blank; the reduced metal in height and thickness of the inner and outer ring ribs is compensated to the bottom surface of the preform, ensuring equal volume of the preform and the finish forging.
In the scheme, the vertex P of an enveloping cone of an enveloping die is selected at the intersection point of the axis of the thin-wall multi-ring high-rib member and the high-rib molded surface; establishing a rectangular coordinate system by taking the vertex P of the enveloping cone as an origin, the axis of the thin-wall multi-ring high-rib component as a z-axis and the radial direction of any thin-wall multi-ring high-rib component as an x-axis;
rotating the z axis in an xz plane by a gamma angle around the vertex P of the envelope cone to the direction of the + x axis to obtain a rotated z' axis; acquiring a radial contour line l of the high-rib profile extending from the origin of coordinates to the direction of the + x axis in an xz plane; and rotating the radial contour line l around the z' -axis for one circle to obtain the enveloping die for forming the high-rib profile.
In the scheme, the distance R between the axis of the second ejector rod for demoulding of the final forged piece and the axis of the final forged piece is calculated by a formula (1); the diameter d of the second ejector rod is calculated by formula (2);
R＝(D1+D2-t1-t2)/4 (1)
d＝(D2-D1-t2+t1)/2 (2)
wherein D is1The diameter of the outer side surface of the high rib of the inner ring D2Is the outer side surface diameter of the outer ring high rib, t1Thickness of high rib of inner ring, t2The thickness of the outer ring high rib.
The implementation of the thin-wall multi-ring high-rib component space enveloping forming method has the following beneficial effects:
(1) the space enveloping forming method of the thin-wall multi-ring high-rib component provided by the invention can replace a cutting process, not only can remarkably improve the production efficiency and the material utilization rate, but also can break through the upper limit of the high rib height which can be processed by the cutting process, and obtain the thin-wall multi-ring high-rib component with continuous metal flow lines.
(2) The space envelope forming method of the thin-wall multi-ring high-rib component can obviously improve the metal flow capacity of a high-rib area and avoid the forging defects of insufficient filling of high ribs, folding of metal in the bottom area of the high ribs and the like.
(3) The high-rib molded surface of the thin-wall multi-ring high-rib component is formed through the enveloping motion of the enveloping die, so that the forming load can be obviously reduced, and a large-range plastic deformation dead zone formed in a die cavity during integral die forging can be avoided, thereby obviously improving the stress state of the die and prolonging the service life of the die.
(4) The space envelope forming process can obviously refine the grain size, improve the carbide form and form a texture structure which is beneficial to improving the component performance by repeatedly rolling the blank, so that the high-performance thin-wall multi-ring high-rib component can be manufactured.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic view of a thin-walled multi-ring high rib member;
FIG. 2 is a schematic view of a finish forge for a thin walled multi-ring high rib member;
FIG. 3 is a schematic representation of a preform for a thin-walled multi-ring high rib member;
FIG. 4 is a schematic diagram of an envelope model cavity design method for a thin-walled multi-ring high-rib member;
FIG. 5 is a schematic diagram of a finish forging die ejector pin design method for a thin-walled multi-ring high rib member;
FIG. 6 is a schematic view of a preform hot forging of a thin-walled multi-ring high rib member;
FIG. 7 is a schematic view of the spatial envelope formation of a thin-walled multi-ring high rib member;
FIG. 8 is a schematic structural diagram of an enveloping die of a thin-wall multi-ring high-rib member;
fig. 9 is a schematic view of high rib end face machining of a thin walled multi-ring high rib member.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a thin-wall multi-ring high-rib component to be formed, wherein the diameter of the outer side surface of a high rib of an outer ring is 64mm, the diameter of the outer side surface of an inner ring component is 44mm, the heights of the high ribs of the inner ring and the outer ring are both 13mm, the thickness of the high rib of the outer ring is 3mm, and the thickness of the high rib of the inner ring is 5.5 mm.
The final forging of the thin-wall multi-ring high-rib member is shown in fig. 2, and the design method comprises the following steps: the top parts of the inner ring high rib and the outer ring high rib of the thin-wall multi-ring high rib component are increased by 3 mm. The die parting surface of the final forging piece is the plane where the heightened outer ring high rib top is located. The top of the outer side surface of the high rib of the outer ring of the finish forging is provided with an inclined flash, and the inclination of the flash is 45 degrees.
The preform of the thin-wall multi-ring high-rib component is shown in FIG. 3 and is designed by the following method: the height of the outer ring rib of the prefabricated blank is 70% of that of the outer ring rib of the finish forging, and the height of the inner ring rib of the prefabricated blank is 30% of that of the inner ring rib of the finish forging; the thickness of the inner ring high rib and the outer ring high rib of the prefabricated blank is 0.5mm less than that of the inner ring high rib and the outer ring high rib of the final forging. No flash was designed on the preform. The reduced metal in height and thickness of the inner and outer ring ribs is compensated to the bottom surface of the preform, ensuring equal volume of the preform and the finish forging.
The design method of the enveloping die of the thin-wall multi-ring high-rib component comprises the following steps: the enveloping die is a cone with 2 bosses, and the vertex P of the enveloping cone of the enveloping die is selected at the intersection point of the axis of the thin-wall multi-ring high-rib member and the high-rib molded surface. FIG. 4 is a schematic diagram of an envelope model cavity design. And establishing a rectangular coordinate system by taking the vertex of the enveloping cone as the P origin, the axis of the thin-wall multi-ring high-rib component as the z axis and the radial direction of any thin-wall multi-ring high-rib component as the x axis. And rotating the z axis by an angle gamma in the xz plane around the vertex P of the envelope cone to the direction of the + x axis to obtain a rotated z' axis. A radial contour line l of the high rib profile extending from the coordinate origin to the + x-axis direction is obtained in the xz plane. And rotating the radial contour line l around the z' -axis for a circle to obtain an envelope model cavity for forming the high-rib profile.
And the second ejection rods 8 for demoulding of the final forging piece are uniformly distributed at the bottom of the final forging piece along the circumferential direction of the final forging piece, as shown in the figure. The distance R between the axis of the second ejector rod 8 and the finish forge axis is calculated from equation (1) as R24.875 mm. The diameter d of the second ejector pin 8 is calculated from equation (2) as d equal to 11.25 mm.
R＝(D1+D2-t1-t2)/4 (1)
d＝(D2-D1-t2+t1)/2 (2)
Wherein D is1And D2The diameters of the outer side surfaces of the inner ring high ribs and the outer ring high ribs are respectively t1And t2The thicknesses of the inner ring high rib and the outer ring high rib are respectively.
The specific forming process of the thin-wall multi-ring high-rib member in the example is as follows:
s1, blanking: the disc material with the diameter of 64mm multiplied by 12.5mm is obtained by adopting a blanking mode of high-speed disc sawing.
S2, performing hot forging forming on the preform: heating the disc material 2 in the S1 to 950-1150 ℃, putting the disc material into a preform female die 1, arranging a male die 3 above the female die 1, and forging the disc material 2 into a preform 4 under the loading of a press machine. In order to ensure that the preform can be smoothly formed in the subsequent finish forging, the outer ring rib of the preform 4 is higher than the inner ring rib, and the middle part of the bottom surface of the preform is provided with a boss for accurately positioning and containing redundant metal in a finish forging die for forming the preform in a space envelope. After the hot forging forming of the prefabricated blank is finished, the first ejection rods 5 uniformly distributed in the prefabricated blank female die move upwards to eject the prefabricated blank out of the prefabricated blank female die cavity.
S3, softening and lubricating the preform: the preform obtained in S2 was subjected to annealing treatment, shot blasting descaling treatment and phosphorus saponification treatment.
S4, space envelope shaping: and placing the prefabricated blank into a cavity of a finish forging female die 7 formed by space envelope, wherein the bottom surface of the prefabricated blank is contacted with the bottom surface of a cavity of the finish forging female die, the outer side surface of a high rib of the outer ring of the prefabricated blank is contacted with the inner wall of the finish forging female die, and the molded surface of the positioning boss is contacted with the molded surface of the positioning groove at the bottom of the finish forging female die, so that the accurate positioning of the prefabricated blank in the cavity of the. The prefabricated blank is pushed by a finish forging female die to approach to an enveloping die 6 at a speed v of 5mm/s, so that the high rib profile of the prefabricated blank is contacted with the enveloping die which does rotating enveloping motion. The speed of rotation of the envelope die 6 is n-25.12 rad/s. Under the spatial enveloping motion of the enveloping die 6, the preformed blank generates continuous local plastic deformation to force metal to flow into the inner ring and outer ring high-rib cavities of the enveloping die, the gap between the outer boss of the enveloping die and the inner boss of the enveloping die is used for forming the inner ring high rib of the component, and the gap between the outer boss of the enveloping die and the female die is used for forming the outer ring high rib of the component, so that the high-rib molded surface of the final forged piece is formed. The enveloping mould structure of the thin-wall multi-ring high-rib member is shown in figure 8. The top of the outer boss in the enveloping die and the bottom of the female die are used for forming the web of the component. After the high-rib profile and the web of the final forging piece are completely formed, redundant metal flows out of the final forging female die from the outer ring high rib to form flash.
S5, opening the die and demoulding: after S4, the enveloping die 6 keeps rotating enveloping motion continuously, the finish forging female die 7 starts reverse motion, and the finish forging piece descends to the initial position along with the finish forging female die. And then, second ejection rods 8 which are uniformly distributed and arranged in the finish forging die 7 eject the finish forging upwards to complete the demoulding of the finish forging.
S6, machining a high-rib end face: and taking the bottom surface of the final forging piece 12 obtained in the step S5 and the outer side surface of the outer ring high rib as positioning references, placing the final forging piece into the positioning seat 9, pressing the final forging piece on the middle area of the bottom surface of the high rib profile along the axial direction by the push rod 11, and fixing the final forging piece on a lathe under the action of the positioning seat 9 and the push rod 11. And (3) driving the finish forging to rotate by the lathe, feeding the lathe tool 10 along the radial direction of the finish forging 12, cutting off the inclined flash and the preset machining allowance of the high-rib end face, and obtaining the thin-wall multi-ring high-rib component. Fig. 9 is a schematic view of high rib end face machining of a thin-walled multi-ring high rib member.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. A space enveloping forming method for a thin-wall multi-ring high-rib component comprises a web plate, inner ring high ribs and outer ring high ribs, and is characterized by comprising the following steps:
s1, blank design: the blank is a disc material, and the diameter of the bottom surface of the disc material is the maximum excircle diameter of the thin-wall multi-ring high-rib component;
s2, performing hot forging forming on the preform: heating the disc material in S1 to 950-1150 ℃, putting the disc material into a preform female die, and forging the disc material into a preform shape under the loading of a press machine; the outer ring high rib of the prefabricated blank is higher than the inner ring high rib, and the middle part of the bottom surface of the prefabricated blank is provided with a boss for accurately positioning and containing redundant metal in a finish forging female die for space envelope forming of the prefabricated blank; after the hot forging forming of the prefabricated blank is finished, first ejection rods uniformly distributed in the prefabricated blank female die move upwards to eject the prefabricated blank out of a prefabricated blank female die cavity;
s3, softening and lubricating the preform: carrying out annealing treatment, shot blasting descaling treatment and phosphorization saponification treatment on the prefabricated blank obtained in the step S2;
s4, space envelope shaping: placing a prefabricated blank into a finish forging female die cavity formed by space envelope, wherein the bottom surface of the prefabricated blank is contacted with the bottom surface of the finish forging female die cavity, the outer side surface of a high rib of the outer ring of the prefabricated blank is contacted with the inner wall of the finish forging female die, and the molded surface of a positioning boss is contacted with the molded surface of a positioning groove at the bottom of the finish forging female die; the envelope die is a cone with an inner boss and an outer boss, and the preformed blank is pushed by the finish forging female die to approach the envelope die, so that the high-rib molded surface of the preformed blank is contacted with the envelope die which does rotary envelope motion; under the spatial enveloping motion of an enveloping die, the preformed blank generates continuous local plastic deformation to force metal to flow into inner ring high-rib and outer ring high-rib cavities of the enveloping die, a gap between a boss and an outer boss in the enveloping die is used for forming member inner ring high-rib, and a gap between an outer boss and a female die of the enveloping die is used for forming member outer ring high-rib, so that a high-rib molded surface of a final forging piece is formed; the top of the boss inside and outside the enveloping die and the bottom of the female die are used for forming a component web plate; after the high-rib profile and the web plate of the final forging piece are completely formed, redundant metal flows out of the final forging female die from the outer ring high rib to form flash;
s5, opening the die and demoulding: after S4, the enveloping die continues to keep rotating enveloping motion, the finish forging female die starts to move reversely, and the finish forging piece descends to the initial position along with the finish forging female die; then second ejection rods which are uniformly distributed and arranged in the finish forging die eject the finish forging upwards to complete the demoulding of the finish forging;
s6, machining a high-rib end face: taking the bottom surface of the final forging obtained in the step S5 and the outer side surface of the outer ring high rib as positioning references, placing the final forging into the positioning seat, pressing the final forging in the middle area of the bottom surface of the high rib profile along the axial direction by the push rod, and fixing the final forging on a lathe under the action of the positioning seat and the push rod; and (3) driving the finish forging to rotate by the lathe, feeding the lathe tool along the radial direction of the finish forging, and cutting off the inclined flash and the preset machining allowance of the high-rib end face to obtain the thin-wall multi-ring high-rib component.
2. The space envelope forming method of the thin-wall multi-ring high-rib component is characterized in that the design method of a finish forging of the thin-wall multi-ring high-rib component is as follows: the top parts of the inner ring high rib and the outer ring high rib of the thin-wall multi-ring high rib component are increased by 3 mm-5 mm; the die parting surface of the final forging piece is a plane where the heightened outer ring high rib top is located; the top of the outer side surface of the high rib of the outer ring of the finish forging is provided with an inclined flash, and the inclination of the flash is 45-60 degrees.
3. The method for forming the space envelope of the thin-wall multi-ring high-rib component as claimed in claim 1, wherein the method for designing the prefabricated blank of the thin-wall multi-ring high-rib component is as follows: the height of the outer ring high rib of the prefabricated blank is 60-70% of that of the outer ring of the final forging piece, and the height of the inner ring high rib of the prefabricated blank is 20-30% of that of the inner ring of the final forging piece; the thickness of the inner ring high rib and the outer ring high rib of the prefabricated blank is 0.5mm less than that of the inner ring high rib and the outer ring high rib of the final forging piece on one side; no flash is designed on the prefabricated blank; the reduced metal in height and thickness of the inner and outer ring ribs is compensated to the bottom surface of the preform, ensuring equal volume of the preform and the finish forging.
4. The method for forming the thin-wall multi-ring high-rib component by space envelope is characterized in that the vertex P of an envelope cone of an envelope mold is selected at the intersection point of the axis of the thin-wall multi-ring high-rib component and a high-rib molded surface; establishing a rectangular coordinate system by taking the vertex P of the enveloping cone as an origin, the axis of the thin-wall multi-ring high-rib component as a z-axis and the radial direction of any thin-wall multi-ring high-rib component as an x-axis;
rotating the z axis in an xz plane by a gamma angle around the vertex P of the envelope cone to the direction of the + x axis to obtain a rotated z' axis; acquiring a radial contour line l of the high-rib profile extending from the origin of coordinates to the direction of the + x axis in an xz plane; and rotating the radial contour line l around the z' -axis for one circle to obtain the enveloping die for forming the high-rib profile.
5. The space envelope forming method for the thin-wall multi-ring high-rib component is characterized in that the distance R between the axis of the second ejector rod for demoulding of the final forging and the axis of the final forging is calculated by the formula (1); the diameter d of the second ejector rod is calculated by formula (2);
R＝(D1+D2-t1-t2)/4 (1)
d＝(D2-D1-t2+t1)/2 (2)
wherein D is1The diameter of the outer side surface of the high rib of the inner ring D2Is the outer side surface diameter of the outer ring high rib, t1Thickness of high rib of inner ring, t2The thickness of the outer ring high rib.
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|---|---|---|---|---|
| CN112296232B (en) * | 2020-10-06 | 2022-06-17 | 武汉理工大学 | Composite forming method for improving high-rib forming limit of thin-wall high-rib component |
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